Rock On! Crystals and Geodes (with 4 Rocks)

Crystals hiding inside rocks! A cave that’s a giant geode! Geode-entombed critters! Your mind will be rocked as you explore the tiny, and not so tiny, geodes and crystals in the worlds around and within us. You’ll even have geodes and crystals of your own to study, and you’ll learn how to make your own crystal-filled geodes. Get ready to rock on! Includes amethyst, green aventurine, natural geode and dyed geode samples.